Knowledge Of Extrusion Blow Molding Plastic Mold
Extrusion blow molding is a manufacturing method of hollow thermoplastic workpieces
. Widely blow system objects are bottles, buckets, cans, boxes and all packaged food, beverage, cosmetics, medicines and daily necessities of the container. Big blow containers commonly used chemical products, lubricants, and packaging of bulk materials. There are other blow molding products, ball, bellows and toys. For the automobile industry, fuel tanks, car shock absorbers, seat backs, center armrest and headrest bracket and are blowing the cover. For machinery and furniture manufacturing, blow molding parts with shell, door frame, the system rack, jar, or to have an open side boxes.
Polymer
The most common
pipe extrusion line high density polyethylene plastic raw materials, most of the milk usually made from such polymers. Often by other polyolefin blow to process. According to purpose, styrene polymers, polyvinyl chloride, polyester, polyurethane, polycarbonates and other thermoplastics can also be used to blow.
Engineering plastics in the automotive industry has recently been widely accepted. Material selection is based on the mechanical strength, weather resistance, electrical properties, optical properties and other performance-based.
Technology
1. The 3 / 4 of the blow molding products are manufactured by the
pipe extrusion machine . Extrusion process is forced through a hole or a mold material to make products. Extrusion blow molding process composed of 5 steps: 1. Plastic-type embryo (hollow
plastic pipe extrusion );
2. The type embryos die close together will flap, and cut off the mold clamping type embryo;
3. To the mold cavity Inflation-based cold-wall training, adjusting the opening and to maintain some pressure during cooling, open the mold, the parts written by blowing; 5. repair flash get finished.
Extrusion
Defined as a polymer mixed with the polymer by melt mixing or polymer system to improve the level of a process. Mixing process from a single additive to deal with a variety of additives, polymer alloys and reactive mixed culture, its wide scope. It is estimated that one-third of U.S. production to go through a mixture of polymer wear. Mix ingredients according to the performance requirements of the final application customization. Mixtures, mixed with hybrid performance, such as high gloss and good impact strength, or the precision molding and good stiffness.
Polymer mixture is often a good dice for further processing. However, a growing interest in industry is to combine the mixture with the next process, such as profile extrusion, so to avoid re-heating of polymer.
Mixing
People use various types of melt mixing equipment, roller mill and the batch from the mixer to the single screw and twin-screw extruder. Continuous mixing to (
pipe extrusion machine ) is the most commonly used equipment, because he can provide consistent quality products, and reduce operating costs. There are two types of hybrid: a mixture of materials distributed to remarry without ingredients in high shear stress can be evenly distributed. Extension of this type of mixture is called mixed or hybrid laminar flow.
Distributed hybrid also known as strong mixing, which impose high shear stress to break into a cohesive group of solid. For example, when the additive material groups were broken, the actual particle size becomes smaller. Mixing operations are often required in a process of mixing two types.
source:
news bxkm by: wenjun
MyPadMedia used for Real iPad Comic Books and eBooks Starcraft 2 Strategy Guide Review-One Starcraft 2 Strategy Guide Book Holds Nothing Back! Contact Lenses History Overview Harry Potter And The Deathly Hallows Part I Why Use an eBook Reader? Easy money making with Facebook Siwa Oasis .. The Story Of Amazing Oasis Organization Article Publishing Former Allied Client's Success Story Find a niche article directory to post to Golf Apparel Maintenance Knowledge History of the Peridot Free Singing Lessons Ebook - Where to Find Them